Before Horatio is set to testify at a murder case in which the defendant is the husband of a city councilwoman, he's given new facts that could prove the man is innocent. There is also new information which revolves around the discovery of a second victim who would match the alleged killer's profile - if the man on trial isn't guilty.

Horatio battles the FBI and U.S. Marshals as he tries to uncover why a beautiful woman was murdered poolside at a ritzy hotel. Evidence suggests it was a professional hit, and the case becomes really puzzling when the feds take an interest. Elsewhere, Calleigh confronts her dad about his drinking problem.